/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/FFDLattice.h
Clamp the given index to [0, Dims] and return the current lattice point position at the clamped index.
FVector3d ClosestLatticePosition ( const [FVector3i](API\Runtime\GeometryCore\FVector3i) & VirtualControlPointIndex, const [TArray](API\Runtime\Core\Containers\TArray)< FVector3d > & LatticeControlPoints ) const